Electric switch



H. F. IRRGANG.

ELECTRIC SWITCH.

APPLICATION FILED 001.16. 1219.

1,352,966. PatentedSept. 14, 1920,

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I I a l/VVEIVTOR flf/eeaA/va ATTORNEYS:

UNITE I stare nuts I. IRRGANG, on ST. MARIES, IDAHO.

ELECTRIC SWITCH.

Specification of Letters Patent.

Patentedsept. 14, 1920.

Application filed October 16, 1919. Serial no. 331,022.

To all whom it may concern:

Be it known that I, HANS F. IRRGANG, a renounced citizen of the Republic of Germany, and a resident of St. Maries, in the and breaking the circuit between two or moreterminals.

The primary object of the invention is to provide a mounting for switch handles of the class above described, which will com-- pletely safeguard the person manipulating the same against contacting with any of the charged parts of the switch in moving the bridge piece to make or break the circuit.

For purpose of illustration the invention will be hereinafter referred to as embodying an electric switch of the knife type.

The accompanying drawing illustrates one form of these knife switches with the invention embodied therein. In said draw- Figure 1 is a plan view;

Fig. 2 is a sectional View on the line 2-2 of Fig. 1; and

Fig. 3 is a sectional view on the line 3-3 of Fig. 2.

mounting which is usually constructed of some insulating material, such as hard rubber, fiber, or the like. As is customary in this type of switches, the blades B are hinged to suitable standards C and adapted to be moved into and out of contact with the terminals D to complete or break the circuit.

Asheretofore practised in manipulating the blades B a handle E was connected to the blades by means of an insulating piece F. The usual way of connecting the blades B to the insulating piece F was to employ screws, bolts or the like, which were usually left A represents a switch board or switch with their heads exposed whereupon should any one come in contact with them, it would be more or less fatal.

According to my invention the method of connecting the blades B to the insulating piece F is such as to leave no part of the connecting means exposed where they will be liable to be in contact with the person manipulating the handle E. With this end in view I propose to terminate the connection of the blades B with the insulating piece F short of the outer face of the insulating piece so that the handle E may be grasped with perfect safety. In the preferred form of this connection the end. of each blade B will be split or recessed as at 5 to leave a pair of outwardly flaring tongues 6, one on eachside of the recess 5, whereupon they engage dove-tailed slots made to receive them V in the inner face of the insulating piece F. To maintain the frictional contact between the dove-tailed slots and the outwardl flar ing tongues 6, a wedge piece 7 may e inserted in the recess 5 to spread the tongues. apart. The wedge piece 7 will preferably terminate at both of its ends in rivet heads 8 to prevent accidental removal of the same.

From the foregoing it will be seen'that while the rivet heads 8 are exposed, SO' to speak, they are not present on the outer sur face of the piece F in position where they would ordinarily be contacted with in the act of grasping the handle E.

I claim 7 g In an electric switch of the character described, .a circuit making and breaking means and means for manipulating the same, an insulated connection between the of the circuit making and breaking means being split providing outwardly, flaring tongues and means for malntalning the said tongues in said slots and insulated from the outer'face of the insulating piece. HANS F. IRRGANG.

'making and breaking means, the said ends 

